nix: add drvs for libpurple, purple-discord & build a docker image

.gitignore

@@ -41,4 +41,4 @@ localhost.port
 *.a
 *.pyc
 .result
-
+result

backends/libpurple/utils.cpp

@@ -18,10 +18,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301 USA
  */
 
-// win32/libc_interface.h defines its own socket(), read() and so on.
-// We don't want to use it here.
-#define _LIBC_INTERFACE_H_ 1
-
 #include "utils.h"
 
 #include <string.h>

nix/default.nix

@@ -1,5 +1,6 @@
+{ pkgs ? import <nixpkgs> {}, libpurple ? import ./libpurple.nix {}, ... }:
+
 let
-  pkgs = import <nixpkgs> {};
   pkgs-eta = import (builtins.fetchTarball {
     # Descriptive name to make the store path easier to identify
     name = "nixos-with-fixed-swiften";
@@ -12,12 +13,15 @@ let
     rev = "647d0821b590ee96056f4593640534542d8700e5";
     sha256 = "sha256:0ks37vclz2jww9q0fvkk9jyhscw0ial8yx2fpakra994dm12yy1d";
   };
-  inherit (import gitignoreSrc { inherit (pkgs) lib; }) gitignoreSource;
+  inherit (import gitignoreSrc { inherit (pkgs) lib; }) gitignoreFilter;
+  filter = gitignoreFilter ../.;
 in
 with pkgs;
 stdenv.mkDerivation {
   name = "spectrum2";
-  src = gitignoreSource ./.;
-  nativeBuildInputs = [ cmake ];
-  buildInputs = [ pkgs-eta.swiften zlib expat boost libpqxx postgresql.lib pidgin libev sqlite log4cxx glib pcre boost protobuf curl jsoncpp popt ];
+  src = builtins.filterSource
+    (path: type: !(lib.strings.hasSuffix (baseNameOf path) "nix") && filter path type)
+    ../.;
+  nativeBuildInputs = [ cmake pkg-config ];
+  buildInputs = [ pkgs-eta.swiften zlib expat boost libpqxx postgresql.lib libpurple libev sqlite log4cxx glib pcre boost protobuf curl jsoncpp popt ];
 }

nix/docker.nix

@@ -0,0 +1,20 @@
+let
+  pkgs = import <nixpkgs> {};
+  libpurple = import ./libpurple.nix { pkgs = pkgs; };
+  spectrum2 = import ./default.nix { pkgs = pkgs; libpurple = libpurple; };
+  purple-discord = pkgs.purple-discord.overrideAttrs (origAttrs: rec {
+    version = "unstable-2020-06-16";
+    buildInputs = [ pkgs.json-glib libpurple pkgs.imagemagick ];
+    src = pkgs.fetchFromGitHub {
+      owner = "EionRobb";
+      repo = "purple-discord";
+      rev = "b0daa37f0ecf7bcfea60163ac3273dd7064ec133";
+      sha256 = "0iqz8p6cfd7yvr31r7npcafz3azs1pf4j7dnw134v93dcvamz2hh";
+    };
+  });
+in
+pkgs.dockerTools.buildLayeredImage {
+  name = "spectrum2";
+  contents = [ spectrum2 purple-discord ];
+  config.Entrypoint = [ "${spectrum2}/bin/spectrum2" ];
+}

nix/libpurple.nix

@@ -0,0 +1,20 @@
+{ pkgs ? import <nixpkgs> {}, ... }:
+
+pkgs.pidgin.overrideAttrs (origAttrs: rec {
+  pname = "libpurple";
+  buildInputs = origAttrs.buildInputs ++ origAttrs.propagatedBuildInputs;
+  configureFlags = origAttrs.configureFlags ++ [
+    "--disable-avahi"
+    "--disable-gstreamer"
+    "--disable-meanwhile"
+    "--disable-gnutls"
+    "--disable-cyrus-sasl"
+    "--disable-farstream"
+    "--disable-vv"
+    "--disable-dbus"
+    "--disable-schemas-install"
+  ];
+  propagatedBuildInputs = [];
+  preInstall = ''cd libpurple'';
+  postInstall = ''rm -rf $out/bin'';
+})